I'm looking for the manual to my old Ryobi grass trimmer model number RET402A

Are you sure about the model number? I see several 30CC engine string trimmers by Ryobi. Two are the Ryobi RY30040B (SS30) and a RY30544 (SS30).

For both of these models, mix a high quality 2-cycle engine oil at 2.6 oz. per gallon of gasoline to pour into the gas tank. This ratio is used in several other Ryobi string trimmer models. Many Ryobi product manuals are available here: https://www.ryobitools.com/power-tools/support/manuals . Most Ryobi gas powered and 40V battery-powered tools will have a model number that starts with RY. The 18 V battery powered models often start with a P.

I hope this helps. If you add a comment with the actual model number, I may be able to provide more information.

Cindy Wells

Hi Gary,
You may already have found what you are looking for but if not, here's a site that will help:
http://www.ereplacementparts.com/ryobi-trimmer-parts-c-7931_15633.html
Good Luck!
Jim

Jerry,

That number is not the model number for the trimmer, which always starts with RY. It is the number for the "bump head assembly" which is considered an accessory. They made 3 for this application as follows:

• Bump Head Assembly, RLT1000, RLT900, RLT1004K

Once you determine your correct trimmer model number you can go to the link below and find your manual. Hope this helps.

RYOBI Product Manuals

Here is what a blow out drawing looks like but since you didn't give me a model number...:

http://www.searspartsdirect.com/partsdirect/part-model/Ryobi-Parts/Grass-line-trimmer-Parts/Model-725R/0909/1503820

Hi and wel;come to FixYa, I am Kelly.
The part you need is item 9 on most parts lists:

Your problem is caused by either drive shaft failure or.. clutch failure. Most of the time the drive shaft fails before the clutch.

The manual is here:
http://www.mymowerparts.com/pdf/Ryobi_String_Trimmers_Blowers_Tillers/700r.pdf

Shaft is PN 682064 or 753-04280

Sears parts direct has the shaft as item 10 this link:
http://www.searspartsdirect.com/partsdirect/part-model/Ryobi-Parts/Grass-trimmer-weed-wacker-Parts/Model-700R/0909/1503820/10060718/00002?blt=06&prst=0&shdMod=700R

Detailed view:
http://www.searspartsdirect.com/partsdirect/part-number/Ryobi-Parts/Grass-trimmer-weed-wacker-Parts/753-04280/0071/247/Model-700R/0909/1503820?keySuffixId=NA&productTypeId=x&searchModelNumber=700R&subCompDesc=Boom%20and%20trimmer&brandDesc=RYOBI&modelDesc=TRIMMER&pathTaken=partSearch&blt=11

Lower price here:
http://www.mowpart.com/p661995/Flex,-Shaft-(Rpls-682064)/product_info.html

Average price ($32.50)

Thanks for choosing FixYa,
Kelly

I have found no manual for your exact model but you can view the manual to a very similar model here:
http://dl.owneriq.net/0/078a5897-3215-4a17-83c1-5a6518b987a3.pdf
You will need Adobe Acrobat Reader installed on your computer to view this.

http://odref.com/pdf/Ryobi/
If you have your model number, an owners manual should be here with correct mixture ratio for petro to 2 stroke oil.

Try this one:

http://www.screwfix.com/sfd/i/cat/pdfs/89/p4763889.pdf

Cheers

Nigel

my ryobi scorpion only has twofuel lines but two on primer can you help

I only just found this solution and it is just what I need. Thank you Jerry.